package com.example.utils;

import java.io.BufferedReader;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileReader;
import java.io.FileWriter;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.io.RandomAccessFile;
import java.io.Reader;
import java.nio.file.Files;
import java.util.ArrayList;
import java.util.List;

public class FileUtils {

    public String doReplace(String input, String replacement) {
        return input.replaceAll(" ", replacement);
    }

    /**
     * 以字节为单位读取文件，常用于读二进制文件，如图片、声音、影像等文件。
     */
    public static void readFileByBytes(String fileName) {
        File file = new File(fileName);
        InputStream in = null;
        try {
            System.out.println("以字节为单位读取文件内容，一次读一个字节：");
            // 一次读一个字节
            in = new FileInputStream(file);
            int tempbyte;
            while ((tempbyte = in.read()) != -1) {
                System.out.write(tempbyte);
            }
            in.close();
        } catch (IOException e) {
            e.printStackTrace();
            return;
        }
        try {
            System.out.println("以字节为单位读取文件内容，一次读多个字节：");
            // 一次读多个字节
            byte[] tempbytes = new byte[100];
            int byteread = 0;
            in = new FileInputStream(fileName);
            showAvailableBytes(in);
            // 读入多个字节到字节数组中，byteread为一次读入的字节数
            while ((byteread = in.read(tempbytes)) != -1) {
                System.out.write(tempbytes, 0, byteread);
            }
        } catch (Exception e1) {
            e1.printStackTrace();
        } finally {
            if (in != null) {
                try {
                    in.close();
                } catch (IOException e1) {
                }
            }
        }
    }

    /**
     * 以字符为单位读取文件，常用于读文本，数字等类型的文件
     */
    public static String readFileByChars(String fileName) {
        String content = "";
        StringBuilder sb = new StringBuilder(256);
        File file = new File(fileName);
        Reader reader = null;

        try {
            System.out.println("以字符为单位读取文件内容，一次读多个字节：");
            // 一次读多个字符
            char[] tempchars = new char[128];
            int charread = 0;
            reader = new InputStreamReader(new FileInputStream(fileName));
            // 读入多个字符到字符数组中，charread为一次读取字符数
            while ((charread = reader.read(tempchars)) != -1) {
                // 同样屏蔽掉\r不显示
                if ((charread == tempchars.length)) {
                    sb.append(tempchars);
                    // System.out.print(tempchars);
                } else {
                    for (int i = 0; i < charread; i++) {
                        // if (tempchars[i] == '\r') {
                        // continue;
                        // } else {
                        sb.append(tempchars[i]);
                        // System.out.print(tempchars[i]);
                        // }
                    }
                }
            }
            content = sb.toString();

        } catch (Exception e1) {
            e1.printStackTrace();
        } finally {
            if (reader != null) {
                try {
                    reader.close();
                } catch (IOException e1) {
                }
            }
        }

        return content;
    }

    /**
     * 以行为单位读取文件，常用于读面向行的格式化文件
     */
    public static void readFileByLines(String fileName) {
        File file = new File(fileName);
        BufferedReader reader = null;
        try {
            System.out.println("以行为单位读取文件内容，一次读一整行：");
            reader = new BufferedReader(new FileReader(file));
            String tempString = null;
            int line = 1;
            // 一次读入一行，直到读入null为文件结束
            while ((tempString = reader.readLine()) != null) {
                // 显示行号
                System.out.println("line " + line + ": " + tempString);
                line++;
            }
            reader.close();
        } catch (IOException e) {
            e.printStackTrace();
        } finally {
            if (reader != null) {
                try {
                    reader.close();
                } catch (IOException e1) {
                }
            }
        }
    }

    /**
     * 随机读取文件内容
     */
    public static void readFileByRandomAccess(String fileName) {
        RandomAccessFile randomFile = null;
        try {
            System.out.println("随机读取一段文件内容：");
            // 打开一个随机访问文件流，按只读方式
            randomFile = new RandomAccessFile(fileName, "r");
            // 文件长度，字节数
            long fileLength = randomFile.length();
            // 读文件的起始位置
            int beginIndex = (fileLength > 4) ? 4 : 0;
            // 将读文件的开始位置移到beginIndex位置。
            randomFile.seek(beginIndex);
            byte[] bytes = new byte[10];
            int byteread = 0;
            // 一次读10个字节，如果文件内容不足10个字节，则读剩下的字节。
            // 将一次读取的字节数赋给byteread
            while ((byteread = randomFile.read(bytes)) != -1) {
                System.out.write(bytes, 0, byteread);
            }
        } catch (IOException e) {
            e.printStackTrace();
        } finally {
            if (randomFile != null) {
                try {
                    randomFile.close();
                } catch (IOException e1) {
                }
            }
        }
    }

    /**
     * 显示输入流中还剩的字节数
     */
    private static void showAvailableBytes(InputStream in) {
        try {
            System.out.println("当前字节输入流中的字节数为:" + in.available());
        } catch (IOException e) {
            e.printStackTrace();
        }
    }

    /**
     * A方法追加文件：使用RandomAccessFile
     */
    public static void appendMethodA(String fileName, String content) {
        try {
            // 打开一个随机访问文件流，按读写方式
            RandomAccessFile randomFile = new RandomAccessFile(fileName, "rw");
            // 文件长度，字节数
            long fileLength = randomFile.length();
            // 将写文件指针移到文件尾。
            randomFile.seek(fileLength);
            randomFile.writeBytes(content);
            randomFile.close();
        } catch (IOException e) {
            e.printStackTrace();
        }
    }

    /**
     * B方法追加文件：使用FileWriter
     */
    public static void appendMethodB(String fileName, String content) {
        try {
            // 打开一个写文件器，构造函数中的第二个参数true表示以追加形式写文件
            FileWriter writer = new FileWriter(fileName, true);
            writer.write(content);
            writer.flush();
            writer.close();
        } catch (IOException e) {
            e.printStackTrace();
        }
    }

    public static void main(String[] args) throws IOException {
         generalFile();

//       updateFile();

    }


    private static void generalFile() {
        String path = "E:/temp/";
        String fileName = "CD0030001";
        String suffix = ".yaml";
        String fullPath = path + fileName + suffix;
        String contentTemplate = readFileByChars(fullPath);
        String dtermPath = "E:/temp/";
        String prefix = "CD0030";

        List<Integer> ignoreList = new ArrayList<Integer>();
//       ignoreList.add(6);
        // ignoreList.add(5);
        // ignoreList.add(9);
        // ignoreList.add(42);
        // ignoreList.add(43);
        // ignoreList.add(47);
        // ignoreList.add(99);
        // ignoreList.add(101);
        // ignoreList.add(103);
        // ignoreList.add(104);
        // ignoreList.add(105);
        // ignoreList.add(120);
        // ignoreList.add(121);
        // ignoreList.add(122);
        // ignoreList.add(123);
        // ignoreList.add(124);
        // ignoreList.add(125);
        // ignoreList.add(126);

        for (int i = 1; i <= 46; i++) {
            if (ignoreList.contains(i)) {
                continue;
            }
            String index = String.format("%03d", i);
            String newFileName = prefix + index;
            String newFilePath = dtermPath + newFileName + suffix;
            // String content =
            // contentTemplate.replaceAll("MobileBasicStore.basicInfos[0]",
            // "MobileBasicStore.basicInfos");
            String content = contentTemplate.replaceAll(fileName, newFileName);
            try {
                File file = new File(newFilePath);

                if (file.exists()) {
                    file.delete();
                }
                file.createNewFile();

                appendMethodB(newFilePath, content);
                System.out.println(newFileName + "--------------");
            } catch (Exception ex) {
                System.out.println(newFileName);
                ex.printStackTrace();
            }
        }
    }

    private static void updateFile() {

        String suffix = ".yaml";
        String dtermPath = "E:/temp/";
        String prefix = "TB0031";

        List<Integer> ignoreList = new ArrayList<Integer>();
//      ignoreList.add(4);
//      ignoreList.add(5);
//      ignoreList.add(9);
//      ignoreList.add(42);
//      ignoreList.add(43);
//      ignoreList.add(47);
//      ignoreList.add(101);
//      ignoreList.add(103);
//      ignoreList.add(104);
//      ignoreList.add(105);
//      ignoreList.add(120);
//      ignoreList.add(121);
//      ignoreList.add(122);
//      ignoreList.add(123);
//      ignoreList.add(124);
//      ignoreList.add(125);
//      ignoreList.add(126);

        String newPrefix = "TB0041";
        for (int i = 1; i <= 63; i++) {
//          if (ignoreList.contains(i)) {
//              continue;
//          }

            String index = String.format("%03d", i);
            String newFileName = newPrefix + index;
            String oldFileName = prefix+index;
//          String oldFilePath = dtermPath + oldFileName + suffix;
            String newFilePath = dtermPath + newFileName + suffix;
            // String content =
            // contentTemplate.replaceAll("MobileBasicStore.basicInfos[0]",
            // "MobileBasicStore.basicInfos");
            String content = "";
            try {
                File file = new File(newFilePath);

                if (file.exists()) {
                    String contentTemplate = readFileByChars(newFilePath);
                    content = contentTemplate.replaceAll("TaoBaoInputIndexTB004",
                            "TaobaoInputIndexTB004").replaceAll("TB0031", "TB0041");
                    file.delete();
                }

                File newFile = new File(newFileName);
                if(newFile.exists()){
                    newFile.delete();
                }
                newFile.createNewFile();
                appendMethodB(newFilePath, content);
                System.out.println(newFileName + "--------------");
            } catch (Exception ex) {
                System.out.println(newFileName);
                ex.printStackTrace();
            }
        }
    }
}
